# rePython - Python RPC server/client library
#
# Copyright (C) 2013 Andrew Dunai, andunai@gmail.com
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

import select

def recv(sock, count, timeout):
	iready, oready, eready = select.select([sock], [], [], timeout)
	if sock in iready:
		data = sock.recv(count)
		if len(data) == 0:
			return None
#		print 'R> %s' % repr(data)
		return data
	else:
#		print 'R> None'
		return None

def send(sock, data, timeout = 0):
#	print '<S %s' % repr(data)
	iready, oready, eready = select.select([], [sock], [], timeout)
	if sock in oready:
		sock.send(data)
